Stock Based Compensation (Tables)

3 Months Ended

Mar. 31, 2013

Summary of Restricted Stock Activity and Related Information

A summary of restricted stock activity and related information for the three months ended March 31, 2013 is presented below:

	Shares			Weighted- Average Grant-Date Fair Value
Nonvested at January 1, 2013		115,722		$	99.50
Granted		86,143		$	80.59
Vested		(47,607	)	$	98.20
Forfeited		—			—
Nonvested at March 31, 2013		154,258		$	89.34